Sorry for the double post, but I won't waste any more time trying to escape the quote in this ghey WYSIWYG editor.
Belbucus was writing about ANH, but it seems true for ESB also in my limited experience thus far.
Last night I watched sides 2 & 5 of the 1425-84 reissue from 1992, and compared the analog & digital tracks. No doubt about it, the analog track (presumably 1980 theatrical) seems more dynamic to these ears than the digital, which I'll presume to be a remix.
So far I haven't discovered any elemental differences, alternate dialog takes or the like, but I'm 98% certain they're two different mixes.
I'll try recording a sample so others can hear....
Anybody familiar with the UK release 1478-70 ?
Neither LDDB nor blam1.com indicates "digital sound" on that one. If it's exclusively analogue, then maybe it's the theatrical mix (at PAL speed).